android - 错误 : The markup in the document following the root element must be well-formed Please help I am new at android

Question

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
   android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".HelloActivity" >

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/hello_world" 
</textview>

Answer 1

不是具体问题，而是Is there a difference between 'valid xml' and 'well formed xml'?和 http://www.w3.org/TR/REC-xml/#sec-well-formed可能会有帮助。